The patent describes a one-handed controller whose
absolute xyz position and rotation in space can be determined. It merges a variety of inputs to determine that information, including:
1) Ultrasound to determine absolute depth from an ultrasonic detector (i.e. the PSEye microphone array), and to determine distance between two controllers in your hands, and/or between multiple player controlers
2) An array of LEDs picked up by the PSEye camera to determine absolute X/Y position (with support from microphone array and ultrasound signals using triangulation), as well as information about the controller's location relative to your body etc.
3) Accelerometer in the controller to determine xyz and rotational inertia
The patent describes replaceable face plates, and a two controller face plate to provide 'traditional' DS controls, and also various configurations like pluggging two together.
- end edit
The pics will explain better:
Patent snooping FTW. Again.
Still reading. There are more pics too. As per that rumour, it uses PSEye and ultrasonic stuff for full tracking (in tandem also with body/head/face tracking).